Swift Mediator Pattern Explained (Delegate Object Communication to a Mediator)
If you've grown an iOS app beyond the basics, you've probably encountered this moment.
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Follow the trail from foundational concepts to practical engineering decisions.
objc_msgSend explained: why Objective-C method calls are not function calls
In Objective-C code, [receiver message] syntax wrapped in brackets looks like an ordinary method call.
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Objective-C Category vs Swift extension: Key Differences and Caveats
iOS development has a point that often causes confusion.
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[iOS Architecture #4] MVP vs MVVM: Key Differences
One question comes up repeatedly in iOS architecture interviews.
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[Vibe Coder #2] What is an API, and why must API keys be hidden?
In Part 1, I compared an app to a restaurant: dining area (frontend), kitchen (backend), and storage (DB). This time, we cover the topic most likely to cause trouble in vibe coding: APIs—and API keys. Everyone has seen “Never expose your key,” but few explain what the key is, where it lives, or what happens when it leaks. This article covers it all.
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